[ClusterLabs] heartbeat/anything Resource Agent : "wait for proper service before ending the start operation"

[Oyvind Albrigtsen]

On 13/04/18 11:07 +0200, Nicolas Huillard wrote:
>Hello all,
>
>One of my resources is a pppd process, which is started with the
>heartbeat/anything RA. That RA just spawn the pppd process with the
>correct parameters and return OCF_SUCCESS if the process started.
>The problem is that the service provided by pppd is only available
>after some time (a few seconds to 30s), ie. when it have successfully
>negotiated a connection. At this time, the interface it creates is UP.
>
>The issue here is that other resources that depend on this connection
>are started by Pacemaker just after it starts pppd, thus before the
>interface is UP. This creates various problems.
>
>I figured that fixing this would require to add a monitor call inside
>the start operation, and wait for a successful monitor before returning
> OCF_SUCCESS, within the start timeout.
>
>Is it a correct approach?
>Are there some other standard way to fix this, like a "wait for
>condition" Resource Agent?
You could try using the monitor_hook parameter to check the status, or
use the Delay agent between the anything resource and the other
resources.
>
>Using Pacemaker 1.1.16 on Debian stretch.
>
>-- 
>Nicolas Huillard
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